Merrill Crowe

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Lead Nitrate

Merrill Crowe

We provide lead nitrate for Merrill Crowe in mining applications.

Benefits of lead nitrate in the Merrill Crowe process within the mining industry:

Lead nitrate

It serves as a reaction initiator.
Increased efficiency in precious metal recovery
It prevents zinc passivation, thus avoiding over-consumption.

We can quickly and timely supply lead nitrate to the US, Canada, Central America, Europe, etc.

Lead nitrate available products

1 ton superbags

25 kg bags

Specifications:

Formula: Pb(NO3)2
Physical description: White crystals
CAS No.: 10099-74-8
Packaging: Superbag
Qty. per package: 1,000 kg

Characteristics:

Purity: 99% min.
Insoluble Materials: 0.20 % max
Humidity: 1.0% max.
Copper: 20 ppm max
Iron: 20 ppm max.

Merrill Crowe process features and benefits

Features

The Merrill Crowe process involves gold and silver precipitation/cementation from a cyanide solution.
The reaction takes place with Zinc powder assisted by lead nitrate.
Then, the precipitated material is filtered and melted to obtain the doré bar.

Benefits

This is the most widely employed mining technology to separate precious metals.
Simple, efficient operation.
Allows for higher Au and Ag concentrations to be recovered in cyanide solutions versus other methods.

Merrill Crowe Process

Cyanide solution purification

Solution deoxygenation

Adding Zn powder and Lead Nitrate

Recovering precipitate obtained by filtration

Casting to get a doré bar

Frequently Asked Questions

What are the most commonly used gold recovery methods as contained in the loaded cyanide solution?

The most popular methods are zinc precipitation (Merrill Crowe) and carbon adsorption.

What are the byproducts from this process?

There are 3 products, gold ore bullion, a "sterile" ( gold-free) cyanide solution and waste materials.

What is the appropriate waste material management resulting from this process?

Since impurities and heavy metals are present, proper handling of these components is essential. Ideally, these should be placed in a dedicated area with the necessary safety precautions.

What countries do you ship to?

We are based in Mexico and ship worldwide. We have clients in the US, Canada, Central and South America.

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